Star Formation Activity of Barred Spiral Galaxies

被引：30

作者：

Kim, Eunbin ^{[1
]}

Hwang, Ho Seong ^{[2
]}

Chung, Haeun ^{[3
,4
]}

Lee, Gwang-Ho ^{[3
]}

Park, Changbom ^{[4
]}

Sodi, Bernardo Cervantes ^{[5
]}

Kim, Sungsoo S. ^{[1
,6
]}

机构：

[1] Kyung Hee Univ, Sch Space Res, Yongin 17104, Gyeonggi, South Korea

[2] Korea Inst Adv Study, Quantum Universe Ctr, 85 Hoegiro, Seoul 02455, South Korea

[3] Seoul Natl Univ, Dept Phys & Astron, Astron Program, 1 Gwanak Ro, Seoul 08826, South Korea

[4] Korea Inst Adv Study, Sch Phys, 85 Hoegiro, Seoul 02455, South Korea

[5] Univ Nacl Autonoma Mexico, Inst Radioastron & Astrofis, Campus Morelia,AP 3-72, Morelia 58089, Michoacan, Mexico

[6] Kyung Hee Univ, Dept Astron & Space Sci, Yongin 17104, Gyeonggi, South Korea

来源：

ASTROPHYSICAL JOURNAL | 2017年 / 845卷 / 02期

基金：

新加坡国家研究基金会; 美国国家科学基金会; 美国国家航空航天局;

关键词：

galaxies: evolution; galaxies: formation; galaxies: ISM; galaxies: spiral; galaxies: star formatio; galaxies: structure; DIGITAL SKY SURVEY; INITIAL MASS FUNCTION; DISK GALAXIES; FORMATION HISTORIES; SECULAR EVOLUTION; FORMING GALAXIES; MOLECULAR GAS; LEGACY SURVEY; BARS; STELLAR;

D O I：

10.3847/1538-4357/aa80db

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We study the star formation activity of nearby galaxies with bars using a sample of late-type galaxies at 0.02 <= z <= 0.05489 and M-r < -19.5 from the Sloan Digital Sky Survey. We compare the physical properties of strongly and weakly barred galaxies with those of non-barred galaxies that have stellar mass and redshift distributions similar to barred galaxies. We find that the star formation activity of strongly barred galaxies probed by starburstiness, g -r, NUV -r, and mid-infrared [3.4]-[12] colors is, on average, lower than that of non-barred galaxies. However, weakly barred galaxies do not show such a difference between barred and non-barred galaxies. The amounts of atomic and molecular gas in strongly barred galaxies are smaller than those in non-barred galaxies, and the gas metallicity is higher in strongly barred galaxies than in non-barred galaxies. The gas properties of weakly barred galaxies again show no difference from those of non-barred galaxies. We stack the optical spectra of barred and non-barred galaxies in several mass bins and fit to the stacked spectra with a spectral fitting code, STARLIGHT. We find no significant difference in stellar populations between barred and non-barred galaxies for both strongly and weakly barred galaxies. Our results are consistent with the idea that the star formation activity of barred galaxies was enhanced in the past along with significant gas consumption, and is currently lower than or similar to that of non-barred galaxies. The past star formation enhancement depends on the strength of bars.

引用

页数：12

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